Beamforming handover messaging in a wireless network

• US 10,530,438 B2
• Filed: 01/25/2018
• Issued: 01/07/2020
• Est. Priority Date: 12/19/2011
• Status: Active Grant

• Current Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Original Assignee: Comcast Cable Communications LLC (Comcast Corporation)
• Inventors: Dinan, Esmael Hejazi
• Primary Examiner(s): Hoang, Thai D
• Application Number:
  US15/879,570
• Publication Number:
  US 20180152223A1
• Time in Patent Office: 712 Days
• Field of Search: 370331-334, 455436-444
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/043 using best eigenmode, e.g. beam forming or beam steering
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/046 taking physical layer constraints into account
• CPC Class Codes: H04B 7/0473 taking constraints in layer or codeword to antenna mapping into account
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/063 Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04L 25/03955 in combination with downlink estimations, e.g. downlink path losses
• CPC Class Codes: H04L 27/2646 using feedback from receiver for adjusting OFDM transmission parameters, e.g. transmission timing or guard interval length
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0236 radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0058 : Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0072 : of resource information of target access point
• CPC Class Codes: H04W 36/0094 : Definition of hand-off measurement parameters
• CPC Class Codes: H04W 36/08 : Reselecting an access point
• CPC Class Codes: H04W 36/24 : Reselection being triggered by specific parameters
• CPC Class Codes: H04W 36/30 : by measured or perceived connection quality data
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/046 : the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 : between access points
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 74/002 : Transmission of channel access control information
• CPC Class Codes: H04W 88/08 : Access point devices

Abstract

A wireless device may support a plurality of channel state information (CSI) processes. The wireless device may send an indication of a number of supported CSI processes to a first base station. The first base station may send an indication of a number of CSI processes supported by the wireless to a second base station. This information may be used during handover of the wireless device.

Claims

1. A method comprising:

transmitting, by a first base station to a second base station and based on a handover decision for a wireless device, at least one first message comprising first configuration parameters for a first quantity of channel state information (CSI) reference signals, wherein the first quantity is less than or equal to a quantity of channel state information (CSI) processes supported by the wireless device;

receiving, by the first base station and from the second base station, at least one second message comprising second configuration parameters for a second quantity of CSI reference signals, wherein the second quantity is less than or equal to the quantity of CSI processes supported by the wireless device; and

transmitting, by the first base station and to the wireless device, a third message comprising the second configuration parameters.

2. The method of claim 1, wherein the third message is at least one of:

an encrypted message;

or

a message comprising an integrity header.

3. The method of claim 1, wherein the third message comprises configuration parameters associated with:

one or more physical channels; and

at least one radio bearer.

4. The method of claim 1, wherein the third message comprises at least one of:

a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.

5. The method of claim 1, wherein the third message comprises uplink channel configuration parameters and handover parameters.

6. The method of claim 1, wherein the third message comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.

7. The method of claim 1, wherein the third message comprises third configuration parameters for a plurality of carriers.

8. The method of claim 1, wherein the first message further comprises one or more parameters indicating the quantity of channel state information (CSI) processes supported by the wireless device.

9. A method comprising:

transmitting, by a first base station to a second base station and based on a handover decision for a wireless device, at least one first message comprising one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier;

receiving, by the first base station and from the second base station, at least one second message comprising second configuration parameters for a second quantity of CSI reference signals, wherein the second quantity is less than or equal to the first quantity; and

transmitting, by the first base station and to the wireless device, a third message comprising the second configuration parameters.

10. The method of claim 9, wherein the third message is at least one of:

an encrypted message;

or

a message comprising an integrity header.

11. The method of claim 9, wherein the third message comprises configuration parameters associated with:

one or more physical channels; and

at least one radio bearer.

12. The method of claim 9, wherein the third message comprises at least one of:

a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.

13. The method of claim 9, wherein the third message comprises uplink channel configuration parameters and handover parameters.

14. The method of claim 9, wherein the third message comprises radio resource configuration parameters comprising one or more physical channel configuration parameters.

15. The method of claim 9, wherein the third message comprises third configuration parameters for a plurality of carriers.

16. The method of claim 9, wherein the second configuration parameters further comprise third configuration parameters for a third quantity of CSI reference signals, and wherein the third quantity is less than or equal to the first quantity.

17. The method of claim 16, wherein the second quantity is less than the third quantity.

18. A method comprising:

receiving, by a first base station and from a wireless device, a first message comprising one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier;

transmitting, by the first base station and to the wireless device, at least one second message comprising configuration parameters for a second quantity of CSI reference signals for the carrier, wherein the second quantity is less than or equal to the first quantity; and

transmitting, by the first base station and to a second base station in response to a determination to perform a handover for the wireless device, at least one third message comprising an indication of the configuration parameters for the second quantity of CSI reference signals.

19. The method of claim 18, further comprising:

receiving, by the first base station and from the wireless device, at least one measurement report subsequent to the transmission of the at least one second message,

wherein the at least one measurement report comprises signal quality information of at least one carrier of the second base station.

20. The method of claim 19, further comprising determining to perform the handover based at least in part on the at least one measurement report.

21. The method of claim 18, wherein the at least one second message is at least one of:

at least one encrypted message;

or

at least one message comprising an integrity header.

22. The method of claim 18, wherein the at least one second message further comprises configuration parameters associated with at least one physical channel, and wherein the at least one second message causes the wireless device to set up or modify at least one radio bearer.

23. The method of claim 18, wherein the at least one second message comprises at least one of:

a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.

24. The method of claim 18, wherein the at least one second message comprises uplink channel configuration parameters and handover parameters.

25. The method of claim 18, wherein the at least one third message further comprises the one or more parameters indicating that the wireless device supports the configuration of the first quantity of CSI processes.

26. A method comprising:

receiving, by a first base station and from a wireless device, a first message comprising one or more parameters indicating that the wireless device supports configuration of a first quantity of channel state information (CSI) processes for a carrier;

transmitting, by the first base station and to the wireless device, at least one second message comprising configuration parameters for a second quantity of CSI reference signals for the carrier, wherein the second quantity is less than or equal to the first quantity; and

transmitting, by the first base station and to a second base station in response to a determination to perform a handover for the wireless device, at least one third message comprising an indication of the one or more parameters indicating that the wireless device supports the configuration of the first quantity of CSI processes.

27. The method of claim 26, further comprising:

receiving, by the first base station and from the wireless device, at least one measurement report subsequent to the transmission of the at least one second message,

wherein the at least one measurement report comprises signal quality information of at least one carrier of the second base station.

28. The method of claim 27, further comprising determining to perform the handover based at least in part on the at least one measurement report.

29. The method of claim 26, wherein the at least one second message is at least one of:

at least one encrypted message;

or

at least one message comprising an integrity header.

30. The method of claim 26 wherein the at least one second message further comprises configuration parameters for at least one physical channel, and wherein the at least one second message causes the wireless device to set up or modify at least one radio bearer.

31. The method of claim 26, wherein the at least one second message comprises at least one of:

a physical layer parameter, a media access control layer parameter, or a radio link control layer parameter.

32. The method of claim 26, wherein the at least one second message comprises uplink channel configuration parameters and handover parameters.